The makers of Russia's Sputnik V vaccine have demanded an apology from the EU's medicines regulator after a senior official warned member states against hastily authorising the jab, comparing emergency rollouts to "Russian roulette." Several EU countries have already begun distributing Sputnik V ahead of approval in the bloc, a move criticised by board chair of the European Medicines Agency (EMA) Christa Wirthumer-Hoche Monday. "We demand a public apology from ...